Rule of 27
The 1st time something funny is said: it’s funny.
The 2nd time: it might be funny.
The 3rd time: funny.
The 4th time: not funny.
The 5th time: might be funny.
The 6th time: not funny.
The 7th time: not funny.
The 8th time: not funny.
The 9th time: not funny.
The 10th time: ...not funny.
The 11th time: not funny.
The 12th time: not funny.
The 13th time: not funny.
The 14th time: not funny.
The 15th time: almost funny.
The 16th time: still not funny.
The 17th time: not funny.
The 18th time: not funny.
The 19th time: not funny.
The 20th time: not funny.
The 21st time: not funny.
The 22nd time: not funny.
The 23rd time: not funny. At all.
The 24th time: not funny.
The 25th time: not funny.
The 26th time: not funny.
The 27th time: funny.

The 28th time: not funny.